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Temp, resisting type carbon fibre emulsion sizing agent and its preparation process and application

The technology of carbon fiber and sizing agent is applied in the field of emulsion type composite sizing agent and preparation, which can solve the problems of complicated procedures and high cost of fluorinated polyamic acid, and achieve the effects of convenient use, good wear resistance and improved bonding strength

Inactive Publication Date: 2007-07-18
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the carbon fiber sizing agent for polyimide resin composite materials. U.S.5239046 introduces the use of end-capped and uncapped linear polyamide-imide as carbon fiber sizing agent for polyimide composite materials. The main slurry, but the polyamide-imide needs to be polymerized by itself, and the process is cumbersome
In U.S.4923752, it is introduced that the carbon fiber coated with fluorinated polyamic acid as a sizing agent has good bonding performance with polyimide resin, but the cost of the fluorinated polyamic acid is relatively high

Method used

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  • Temp, resisting type carbon fibre emulsion sizing agent and its preparation process and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix sorbitan monostearate polyoxyethylene ether (T-60), fatty alcohol polyoxyethylene ether (JFC), and silicone defoamer in a mass ratio of 20:70:10 to obtain a mixing aid , put it aside. GCPI and E-55 are mixed in a mass ratio of 80:20, stirred evenly to obtain the main slurry of the sizing agent, which is dissolved in dimethylformamide, and the mass ratio of the main slurry to the organic solvent is 1:1, and then Add the mixing aid prepared in advance, the mass of the mixing aid is 1% of the mass of the main slurry. Stir with a high-shear dispersing emulsifier at a speed of 10,000 rpm. Under vigorous stirring, deionized water was added dropwise, and the mass ratio of deionized water to organic solvent was 0.04:1, and then stirring was continued for 30 minutes to obtain a sizing emulsion. The prepared emulsion was diluted to 3 wt%, and the sizing agent of this concentration was attached to the polyacrylonitrile carbon fiber by dipping method, the dipping time was 5s,...

Embodiment 2

[0027] Mix alkylphenol polyoxyethylene ether (OP-7), secondary octanol polyoxyethylene ether (JFC-2), and silicone antifoaming agent in a mass ratio of 40:50:10 to obtain a mixing aid, which is stored for later use . GCPI and E-51 are mixed in a mass ratio of 80:20, stirred evenly to obtain the main slurry of the sizing agent, which is dissolved in dimethylacetamide, and the mass ratio of the main slurry to the organic solvent is 1.5:1, and then Add the mixing aid prepared in advance, the quality of the mixing aid is 2% of the mass of the main slurry. Stir with a high-shear dispersing and emulsifying machine with a rotating speed of 13000 rpm. Under vigorous stirring, deionized water was added dropwise, and the mass ratio of deionized water to organic solvent was 0.08:1, and then the stirring was continued for 40 minutes to obtain a sizing emulsion. The prepared emulsion was diluted to 1.0 wt%, and the sizing agent of this concentration was attached to the polyacrylonitrile ...

Embodiment 3

[0029]Mix sorbitan monostearate polyoxyethylene ether (T-60), a mixture of polyoxyethylene and polyoxypropylene ether (1108), and a silicone defoamer in a mass ratio of 60:30:10, Get the mixing aid and put it aside for later use. GCPI and E-44 are mixed in a mass ratio of 70:30, stirred evenly to obtain the main slurry of the sizing agent, which is dissolved in dimethyl sulfoxide, and the mass ratio of the main slurry to the organic solvent is 2:1, and then Add the pre-prepared mixing aid, the mass of the mixing aid is 3% of the mass of the main slurry. Stir with a high-shear dispersing and emulsifying machine with a rotating speed of 15000 rpm. Under vigorous stirring, deionized water was added dropwise, and the mass ratio of deionized water to organic solvent was 0.1:1, and then the stirring was continued for 60 minutes to obtain a sizing emulsion. The prepared emulsion was diluted to 1.5 wt%, and the sizing agent of this concentration was attached to the polyacrylonitrile...

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Abstract

The heat resisting emulsion sizing agent for carbon fiber consists of main sizing agent and assistant in 1-5 wt% of the main sizing agent. The main sizing agent is mixture of thermoplastic polyimide resin and glycidol ether type epoxy resin in the weight ratio of 50-90 to 10-50; and the assistant includes emulsifier, wetting agent and defoaming agent in the weight ratio of 10-80 to 10-80 to 10. The present invention has the advantages of low cost, stable performance, convenient use and no environmental pollution.

Description

technical field [0001] The invention belongs to an emulsion type composite sizing agent for coating carbon fibers and a preparation method thereof. The composition can improve the surface performance of the sizing fiber, can inhibit the generation of fuzz in the processing process of the carbon fiber, improve the wear resistance of the fiber, and can also improve the interfacial bonding between the fiber and the matrix resin. Background of the invention [0002] Polyacrylonitrile carbon fiber (PANCF) is the main reinforcing fiber material for manufacturing high-performance composite materials. Due to its high specific strength, high specific modulus and excellent thermal conductivity, electrical conductivity, corrosion resistance and other properties, the reinforced composite materials are widely used in aviation, aerospace, industry, construction, sports and other fields. In recent years, with the development of the aerospace industry, the matrix resin is required to be ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/59D06M15/55D06M101/40
Inventor 杨永岗曹霞温月芳
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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